Telltale apparatus for running machinery.



PATENTED JULY 21, 1908.

H. O. ORMISTON & W. D. MARTIN. TELLTALE APPARATUS FOR RUNNING MACHINERY.

APPLICATION FILED AUG. 10 1907.

- I UNITED. STATES. PATENT OFFICE. nARRYoaiII's'roN,oRMIsroN, orKoeARiin, AND WILLIAM DAVID MARTIN, or ASHFIE'LD, NEW SOUTH warns,AUSTRALIA.

TELLTALE APrARA'rUsroR nimmns MACHINERY.

No. seases.

ing-1s a specification...

This invention has been devised with a' view to install it on runningmachinery in order to warnthe attendant, while the machinery is running,(among other things) when the bearings have been worn down to such anextent that there is a danger (in electric motors, for instance) of thearmature coming into contact with the poles. Further, should anythinghappen which might cause the armature, or any part of the machinery tocome in dangerous proximity withv the poles in electric motors, althoughthe bearrings may not have been worn down, the attendant;shall be warnedofthe danger ofdaii'ia gfiflshatjisflikely'to'ensue to the armal tu f'fifithe-mdtor unless it be stopped runnin g' without unnecessar delay,in order to examine and locatethe efect, if any.

The apparatus consists of two blocks of ebonite, or analogous material,one block bein above the other; each block-is'pro- 'vide" -with contactpoints, which, if brought iht'o co n'tact will cause an electric bell toring q;;.. 'ther warning sound to be made. The two blocks and thecontact points will be kept apart by means of a spring. The apparatus,will, be installed inany suitable osition, in an electric motor,preferably between two of thepoles of the motor, and will be so disposedthat position that the armature, as it becomesuncentered owing to .thewearing down of the bearin s, shall touch the upper surface of thetoplock and depress It so that the contact oints on the two locks shalltouch one anot er and thus close an electric bell circuit or. cause anysuitable tell-tale appliance to give audible warning of thedamage thatis hkely to ensue, unless immediate steps are taken to remedy thedefect.

In the accompanyin drawings the invention is shown as it will beinstalled on an electric motor.

. '55- Figure 1 is a half vertical section and half 4 Specification ofLetters Patenti Application filed August 10, 1907. Serial No. 333,069.

upper C of the well,projects downwards a dowel pin H, which enters theprojecting part C of PatentedJuly 21, 1908.

side elevation of the appliance complete. Fig. 2 is a sectional plan ofthe same, the section being taken on the'line 12 of Fig. 1. Fig. 3 is anend-elevation of a motor frame showing the a liance, on a small scale,installed in position between two poles of a motor.

1 A is the lower ebonite block. to which is. screwed a li ht brasscasting B. In the center of the bock A is a welltC, countersunk into thesolid ebonite, the wall of which .well is continued above the top levelof the block A, at 0 for a purpose to be afterwards indicated.Projecting upwards from the casting B are hollow contact oints D, D.Vertically above the lower ldck A, is the u per ebonite block E, theupper surface of which is recessed to contain an ebonite roller F, whichis intended to receive the impact of the armature, (or other partof'running machinery), should the axial bearings, be so worn down thatthe armaturehas dropped In orderto reduce 'the friction of the-roller Fin its recess, the

from its true position.

roller or the recessr may be. provided with balls f in ball races;,.

On'the underside of the upper block is a light brass casting B similarto the casting B on the lower block A. The contact points D D will bevertically'above the lower contact points D, D, and will be eenteredwith them by means of the guide dowels G, G, which, preferably, pro'ectdownwards from the up er block E. mm the center of the block E, andvertically above the wall the well, and rests upon a helicaL spring Jwithin the well-r The spring Jwillibe' nic'ompression and will raise theupper block E so that the contact points D,- g 'hanuemain apart,assho'wn 1n the drawings. On the under side of the up er block E is anannular groove 6 which is a a ted to receive the to end of the wall C oft e well when the bloc E is depressed. is a small battery which may beplaced in any convenient position; L is the bell, and k, k, are theconnecting wires. 1

In an electric motor, the appliance is referably located between two ithe poles g, P,- as'shown in Fig. 3; I

In an electric motor the a pliance will op-z erate as follows, referencegein' made par ticularly to 3:- When the earings are so worn down thatthe armature M is out of center, it will approach and touch the rollerF, thus depressing the upper blocl: E, causing the upper and owercontact points D, ID,

to touch and close the bell circuit when the bell L will ring and warnthe attendant of the proximate danger of neglecting the summons; Havingnow described our invention, what we claim as new and desire to secureby Letters Patent is:

1. In running machinery, a warning or tell-tale appliance consisting ofa lower ebonite block with projecting metallic contact points, an upperebonite block with propjectmg metallic contact points, a spring to reepthe upper and lower, contact oints a art, and an electric bell circuit w'ch sha be closed when the contact points on the two blocks touch, forthe purpose of warning the attendant, as herein set forth.

2. In running machinery, a warnin or tell-tale appliance consistingof alower ebonite block with projecting. metallic contact points and aspring, an upper ebonite block with projecting metallic contact points,such block resting upon the spring on the lower block, a roller recessedinto the upper face of the upper block, such roller being adapted tosustain the im act of the runnin part of the machinery suc as thearmature wien brought into contact therewith, and an electric bellcircuit which shall be closed and the bell caused to rin when the upperblock is depressed by t e armature and the contact points are thus madeto touch, as specified.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

HARRY ORMISTON @RMISTON. WiLLIAM DAVID MARTIN.

Witnesses;

MANFIELD NEWTON, ArnnnrMwsnr.

